In a groundbreaking experiment, Peter Andre, Shaun Wallace, Nadine Dorries, Hayley Tamaddon, Tessa Sanderson and Hugo Taylor take part in an extreme junk food eating regime. For 21 days, the participants will live on a diet made up of the UK's top three favourite junk types - fried chicken, burgers and pizza. Throughout the experiment, they will be put through medical tests designed by experts to reveal exactly what is happening to their bodies